It is a dilemma faced by anyone invited to meet the Queen: what exactly does one wear?

This sniper serving with the Household Cavalry Regiment opted for his work outfit... leaving the Queen looking more than a little perplexed.

Looking like Chewbacca from the movie blockbuster Star Wars, the crack marksman wore a 'ghillie suit', a type of camouflage clothing designed to resemble heavy foliage, leaves and twigs to remain concealed from the enemy. The suit even moves in gusts of wind.

Perplexed: Queen Elizabeth as she meets a sniper from the Household Cavalry at Combermere Barracks in Windsor today

The Queen as she meets a veteran Drum Horse called 'Mercury' in her visit today

He also wore Army-issue brown boots and carried a powerful sniper rifle while chatting to Her Majesty.

The Queen, dressed in a long violet coat with a matching hat, met soldiers and horses from the Household Cavalry Regiment when she visited Combermere Barracks in Windsor today.